#### Metal Removal Rate: Calculator, Formulas Theory Machining Doctor

MRR Metal Removal Rate in CM 3 /min or Inch 3 /min. Chip Area perpendicular Speed Unit Constant M R R = A p × F n ⏞ × V c ⏞ × K ⏞. In imperial units, the speed is given in SFM and K equals12 to convert the speed into Inches/min and get the final result in Inch 3. In metric units, K=1 to get the result in Cm 3.